CN212725900U

CN212725900U - Slip ring connector

Info

Publication number: CN212725900U
Application number: CN202022144848.5U
Authority: CN
Inventors: 倪晓森; 李旺
Original assignee: Cwb Automotive Electronics Co ltd
Current assignee: Cwb Automotive Electronics Co ltd
Priority date: 2020-09-25
Filing date: 2020-09-25
Publication date: 2021-03-16
Anticipated expiration: 2030-09-25

Abstract

The utility model relates to the technical field of connectors, and discloses a slip ring connector, which comprises a conductive rod assembly and a rotatable rotating part, wherein the rotating part is provided with an inner cavity, a plurality of conductive rings are arranged on the outer peripheral wall along the axial direction at intervals, and a flexible circuit board which is clamped and fixed on the inner wall of the rotating part and is electrically connected with the conductive rings is arranged in the rotating part along the axial direction; the electric brush assembly is arranged on the outer side of the conducting rod assembly, and a plurality of electric brush wires in sliding electrical contact with the conducting ring assembly are arranged on the electric brush assembly. The flexible circuit board is adopted as the driving circuit board of the rotating part to replace the existing conducting wire, the space of the inner cavity occupying the shaft core is small, the conducting performance of the conducting slip ring is not required to be improved by increasing the number of the conducting wires, and the increase of the radial size of the conducting slip ring caused by excessive conducting wires is effectively avoided. Meanwhile, the flexible circuit board is directly clamped and fixed in the inner cavity of the rotating part and is electrically connected with the conducting ring, other fixing structures are not required to be additionally arranged, and the flexible circuit board is simple in structure, small in size and low in manufacturing cost.

Description

Slip ring connector

Technical Field

The utility model relates to a connector technical field specifically is a sliding ring connector.

Background

Slip rings belong to the application range of electrical contact sliding connection, are used for effectively and reliably electrically connecting two relatively rotating parts and ensuring the transmission of electrical signals between the parts, and are also called slip rings, collector rings, adapters and the like. The electric brush mainly comprises an insulating substrate (an insulating ring part), a sliding conductive surface (a conductive ring part), an elastic material (electric brush wires), a bearing, a support, a shell seat body and other auxiliary components, wherein the sliding of the electric conductive ring is in contact coupling with the electric brush wires, and the electric conductive ring is driven by a rotating shaft on the fixed support to rotate, so that electric signals and electric energy are continuously transmitted.

Existing slip rings are mainly of cylindrical type, which transmit electrical signals mainly through axially extending sliding conductive surfaces. For this reason, the existing cylindrical conductive slip ring often compensates for its low transmission performance by increasing the axial length of the sliding conductive surface to increase the number of conductive rings and the number of brush wires of the sliding conductive surface.

Chinese patent CN206283084U discloses a conductive slip ring, including stator module, rotor subassembly and shell, stator module includes axle core, a plurality of conducting ring and a plurality of interior wire, and stator module includes first cover shell, second cover shell and a plurality of terminal, and the terminal includes fixed part and the elastic contact portion with the conducting ring sliding connection, and the shell cover is located outside the stator module. The fixed part of stator module's terminal is perpendicular with the rotatory central line of rotor assembly's conducting ring, and the terminal and the outer wire of the stator module of being convenient for arrange more closely. The conductive slip ring of above-mentioned structure, interior wire in the rotor subassembly is connected with the conducting ring one-to-one welding electricity, in order to improve conductive slip ring's electric conductive property, need increase the quantity of conducting ring and brush silk, the quantity of the interior wire that corresponds is in order to increase, this diameter increase that must lead to the inner chamber of axle core or rotor subassembly, make conductive slip ring's radial dimension bigger, installation space is also bigger, and also can increase conductive slip ring's weight, increase rotation torque, make life shorten.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that the rotor subassembly of overcoming the conductive slip ring among the prior art welds through setting up interior wire and conducting ring one-to-one, in order to improve electric conductive property, need increase the mode of conducting ring, brush silk and interior wire, and the size and the installation space that lead to conductive slip ring are big, and conductive slip ring weight increases, the increase of rotation torque, the technical problem that life shortens to a small-size sliding ring connector that the structure is simpler, weight is lighter is provided.

To this end, the utility model provides a slip ring connector, include:

the conductive rod assembly comprises a rotatable rotating part, the rotating part is provided with an inner cavity, a plurality of conductive rings are arranged on the outer peripheral wall of the rotating part at intervals along the axial direction, and a flexible circuit board which is clamped and fixed on the inner wall of the rotating part and is electrically connected with the conductive rings is arranged in the rotating part along the axial direction;

and the electric brush assembly is arranged on the outer side of the conductive rod assembly, and a plurality of electric brush wires in sliding electrical contact with the conductive ring assembly are arranged on the electric brush assembly.

Optionally, the slip ring connector, the flexible circuit board includes:

the welding part extends along the axial direction of the rotating part, a plurality of welding points which are in one-to-one correspondence with the conducting rings are arranged on the welding part, and the conducting rings are welded with the corresponding welding points to form electric connection;

the pin part is perpendicular to the welding part and provided with a plurality of jacks, and the jacks are suitable for fixing a plurality of first pins electrically connected with the flexible circuit board.

Optionally, in the slip ring connector, one end of the welding portion connected to the pin portion is provided with a convex portion protruding outward and extending, and the convex portion is suitable for being clamped and fixed in a clamping groove formed in an inner wall of one end of the rotating member facing the first pin structure.

Optionally, the flexible printed circuit board further includes a bending portion integrally formed with the welding portion and the pin portion and disposed between the welding portion and the pin portion, and the bending portion is adapted to be located outside the rotating member and the first pin structure.

Optionally, the slip ring connector is arranged such that the welding points are arranged in two rows at intervals, and any row is provided with a plurality of welding points arranged at intervals and the welding points in the two rows are arranged in a staggered manner.

Optionally, the slip ring connector, the conductive ring includes:

the conducting ring comprises a conducting ring body, wherein a hollow area is formed in the middle of the conducting ring body in a hollow mode, a first positioning groove and a second positioning groove which are radially outwards recessed and oppositely arranged are formed in the inner wall of the hollow area of the conducting ring body, the first positioning grooves of any two adjacent conducting rings are arranged in a staggered mode, and the positioning grooves and the second positioning grooves are of asymmetric structures.

Optionally, in the slip ring connector, a distance between an outermost end of the sidewall of the first positioning groove facing the welding point and the center of the conductive ring body is smaller than a distance between an outermost end of the sidewall of the first positioning groove facing away from the welding point and the center of the conductive ring body;

the distance between the outermost end of the side wall, facing the welding point, of the second positioning groove and the center of the conductive ring body is equal to the distance between the outermost end of the side wall, facing away from the welding point, of the second positioning groove and the center of the conductive ring body, and the distances are both greater than the distance between the outermost end of the side wall, facing the welding point, of the first positioning groove and the center of the conductive ring body.

Optionally, in the slip ring connector, the inner wall of the conductive ring body is further provided with at least one protrusion extending inward in the radial direction, and an extension line of the protrusion direction of the protrusion is perpendicular to the diameters of the first positioning groove and the second positioning groove.

Optionally, in the slip ring connector, a radially inwardly recessed groove is formed in the outer peripheral wall of the conductive ring body, and the brush wire is adapted to be slidably abutted in the groove.

Optionally, the slip ring connector, the brush assembly further includes a brush plate electrically connected to the brush wire, a brush holder for fixing the brush plate, and a plurality of second pins electrically connected to the brush plate, and the second pins are disposed opposite to the first pins.

The utility model discloses technical scheme has following advantage:

1. the utility model discloses a slip ring connector, include: the conductive rod assembly comprises a rotatable rotating part, the rotating part is provided with an inner cavity, a plurality of conductive rings are arranged on the outer peripheral wall of the rotating part at intervals along the axial direction, and a flexible circuit board which is clamped and fixed on the inner wall of the rotating part and is electrically connected with the conductive rings is arranged in the rotating part along the axial direction;

The sliding ring connector with the structure adopts the flexible circuit board as the driving circuit board of the rotating part to replace the existing lead, the space of the inner cavity occupying the shaft core is small, the conductive performance of the conductive sliding ring is not required to be improved in a mode of increasing the number of leads, and the increase of the radial size and the installation space of the conductive sliding ring caused by excessive leads is effectively avoided. The drive circuit board is light in weight, and the whole weight of conducting slip ring is lighter, and the rotation torque is little, long service life. Meanwhile, the flexible circuit board is directly clamped and fixed in the inner cavity of the rotating part and is electrically connected with the conducting ring, other fixing structures are not required to be additionally arranged, and the flexible circuit board is simple in structure, small in size and low in manufacturing cost.

2. The utility model discloses a sliding ring connector, the conducting ring body, middle part fretwork form the fretwork district, set up radial outside sunken and relative first constant head tank and the second constant head tank that sets up on the inner wall in the fretwork district of conducting ring body, the first constant head tank dislocation set of two arbitrary adjacent conducting rings, the constant head tank with the second constant head tank is asymmetric structure. Through the setting of asymmetric structure's first constant head tank and second constant head tank to make the welding point of adjacent conducting ring and flexible line way board be crisscross setting, it is more reasonable to arrange, and flexible line way board's fixed atress is more even.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic perspective view of a slip ring connector according to an embodiment;

FIG. 2 is a schematic cross-sectional view taken along line A-A of the slip ring connector of FIG. 1;

fig. 3 is a schematic structural diagram of an assembly of a conductive rod assembly, a flexible printed circuit board and a first contact pin structure of a slip ring connector according to an embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view of the structure of FIG. 3 without the first pin;

fig. 5 is a schematic structural diagram of a conductive ring of the slip ring connector according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a flexible circuit board of the slip ring connector in an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a brush holder of the slip ring connector according to an embodiment of the present invention.

Description of reference numerals:

1-a conductive rod assembly; 10-a conductive ring; 100-a conductive ring body; 101-a first positioning groove; 102-a second positioning groove; 103-a projection; 104-a welding surface; 11-a rotating member; 12-a first end; 120-card slot; 13-a second end;

2-a brush assembly; 20-electric brush filaments; 21-a brush holder; 210-a first bearing card slot; 211-second bearing snap groove; 212-a first positioning structure; 213-a second positioning structure; 214-a third positioning structure; 22-a brush plate;

3-a flexible circuit board; 31-a weld; 310-a weld; 311-a convex portion; 32-a pin portion; 33-a bending part;

4-a first pin structure; 41-first pin; 42-a first needle hub;

5-a second pin structure; 51-second pin; 52-a second hub;

6-a first bearing;

7-a second bearing;

8-shell.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 to 7, the present invention provides a slip ring connector, including a conductive rod assembly 1, a brush assembly 2, a flexible printed circuit board 3, a bearing and a housing 8, wherein the conductive rod assembly 1 includes a rotating member 11 and a plurality of conductive rings 10, wherein the rotating member 11 is in a rod-like structure and has a first end 12 and a second end 13 which are arranged oppositely, the diameter of the first end 12 is greater than that of the second end 13, the first end 12 is hollow, the outer surface is provided with a thread, and the second end 13 is in a column shape without an external thread. The brush component 2 is arranged at the periphery of the conducting rod component 1, brush wires 20 are fixed on the brush component, and the brush wires 20 are in sliding contact with the conducting ring 10 so as to form electric connection between the brush wires 20 and the conducting ring 10; the two bearings are respectively sleeved and fixed at a first end 12 and a second end 13 of the rotating part 11; the shell 8 is sleeved on the periphery of the brush component 2, and the first end 12 of the rotating part 11 of the conducting rod component 1 extends out of the shell 8.

As shown in fig. 2 to 4, the conducting rod assembly 1 includes a rotating member 11, conducting rings 10 and a flexible circuit board 3, the rotating member 11 is made of an insulating material and is integrally injection-molded with the conducting rings 10, two adjacent conducting rings 10 are arranged at intervals, and the interval between the two adjacent conducting rings 10 is separated by the insulating rotating member 11, so as to form electrical insulation between the two adjacent conducting rings 10, that is, the conducting rings 10 are arranged at intervals along an axial direction and are placed in an injection mold to be injected with plastic for injection molding, so as to form the conducting rod assembly 1. The interior of the rotating member 11 has a cavity extending in the axial direction, and the flexible wiring board 3 is inserted from the first end 12 to the second end 13 of the rotating member 11, and is partially located outside the first end 12. Specifically, as shown in fig. 4 and 6, the flexible printed circuit board 3 includes a T-shaped soldering portion 31, an S-shaped bending portion 33, and a plate-shaped pin portion 32, where the pin portion 32 is perpendicular to the soldering portion 31, the soldering portion 31 is provided with a plurality of soldering points 310, the soldering points 310 are respectively soldered to each conductive ring 10, specifically, soldered to the pad by a solder paste-on-pad manner, a protruding portion 311 protruding in the front-back direction is provided at one end of the pin portion 32, which is connected to the bending portion 33, and the protruding portion 311 is adapted to be fixed in a clamping groove 120 provided on the inner wall of the first end 12 of the rotating member 11 in a clamping manner. That is, the bent portion 33 and the pin portion 32 are both located outside the first end 12 of the rotating member 11. Specifically, the welding points 310 on the welding portion 31 are divided into two rows, each row of welding points includes a plurality of welding points 310 arranged at intervals along the length direction of the welding portion, that is, along the axial direction of the rotating member shown in fig. 4, the two rows of welding points 310 are located on the front and rear sides of the welding portion, and the two rows of welding points 310 are arranged in a staggered manner, for example, the first welding point 310 on the rear side, which is close to the first end 12, is located between the first welding point 310 and the second welding point 310 on the front side, which is close to the first end 12. A plurality of jacks are formed in the pin part 32 and used for fixedly inserting the first pins 41 corresponding to the number of the jacks, pin fixing seats 42 are arranged outside the first pins 41, and the pin fixing seats 42 can be fixedly inserted into the pin part 32 through positioning columns and other structures. Note that the welding point 310 is provided only on one surface of the welding portion 31, specifically, the upper surface as shown in fig. 4.

As shown in fig. 5, the conductive ring 10 includes a circular conductive ring body 100, the middle of which is hollowed to form a hollow area, a first positioning groove 101 and a second positioning groove 102, which are radially outwardly recessed and correspondingly clamped with two side walls of the welding portion 31, are disposed on an inner wall of the hollow area, and the first positioning groove 101 and the second positioning groove 102 are oppositely disposed on two sides of the inner wall of the conductive ring body 100. In order to facilitate the correspondence with the welding point 310 on the flexible circuit board 3, the first positioning slot 101 and the second positioning slot 102 are asymmetric structures, specifically, the distance between the outermost end of the sidewall of the first positioning slot 101 facing the welding point 310, that is, the leftmost end of the top wall of the first positioning slot 101 shown in fig. 5, and the center of the conductive ring body 100 is smaller than the distance between the outermost end of the sidewall of the first positioning slot 101 facing away from the welding point 310, that is, the leftmost end of the bottom wall of the first positioning slot 101 shown in fig. 5, and the center of the conductive ring body 100, the distance between the outermost end of the sidewall of the second positioning slot 102 facing the welding point 310, that is, the rightmost end of the bottom wall of the second positioning slot 102 shown in fig. 5, and the center of the conductive ring body 100 is equal to and larger than the distance between the outermost end of the sidewall of the first positioning slot 101 facing the welding point 310, that is, and the outermost end of the bottom wall of the second positioning slot 102 shown in fig. 5, that is The end, i.e., the leftmost end of the top wall of the first positioning slot 101 shown in fig. 5, is spaced from the center of the conductive ring body 100. The top wall of the first positioning groove 101 abuts against the position of the welding point 310, and the left end face of the top wall of the first positioning groove 101 is formed as the welding surface 104, that is, the conductive ring 10 is correspondingly welded to the welding point 310 on the flexible circuit board 3 through the welding surface 104 to form an electrical connection. The first positioning grooves 101 of two adjacent conductive rings 10 are also arranged in a staggered manner, that is, the two adjacent conductive rings 10 are formed by injection molding after rotating 180 ° on the rotating member 11. Optionally, the inner wall of the hollow area is further provided with two protrusions 103 protruding inward in the radial direction and oppositely disposed on two sides of the inner wall of the hollow area. Alternatively, the diameters of the protrusion 103 and the first and

second detents

101 and 102 are perpendicular to each other. The number of the projections 103 may be two as shown in fig. 5, and each of them is positioned in abutment with the outer peripheral wall of the rotor 11. Since the conductive ring 10 is integrally formed with the rotating member 11, the protrusion 103 may be provided only one or not, and will not be described and limited in detail.

As for the brush assembly 2, as shown in fig. 2 to 6, the brush assembly 2 includes a brush holder 21, a brush plate 22, brush wires 20 and a second pin structure 5, the cross section of the brush holder 21 is trapezoidal, the brush holder 21 includes two brush holders 21, the two brush holders 21 are disposed opposite to each other up and down, an accommodating cavity (not shown) for accommodating the conducting rod assembly 1 is formed in the middle of the two brush holders, the conducting rod assembly 1 axially traverses the accommodating cavity defined by the two brush holders 21, the first end 12 extends out of the brush holder 21, and the second end 13 is located in the brush holder 21. As shown in fig. 7, the positions of each brush holder 21 corresponding to the two bearings, specifically, the first bearing 6 at the first end 12 and the second bearing 7 at the second end 13, are respectively provided with a semicircular bearing slot, the two corresponding semicircular bearing slots on the two brush holders 21 enclose a complete circular bearing slot matched with the shapes and sizes of the first bearing 6 and the second bearing 7, and the diameter of the first bearing 6 is greater than that of the second bearing 7. Correspondingly, the diameter of first bearing pocket 210 is greater than the diameter of second bearing pocket 211. Two first positioning structures 212 are respectively a positioning column and a positioning hole, optionally, two first positioning structures 212 on one of the brush holders 21 can be both positioning columns or both positioning holes, correspondingly, two first positioning structures 212 on the other brush holder 21 are both positioning holes or positioning columns, and the two brush holders 21 are detachably connected through the first positioning structures 212 in an inserting and fixing manner, so that the assembly, disassembly and maintenance are facilitated. Optionally, one end of each of the two brush holders 21 corresponding to the first end 12 of the conducting rod assembly 1, that is, the left end of the brush holder 21 shown in fig. 7, is provided with a second positioning structure 213, the front and back sides of one end corresponding to the second end 13 of the conducting rod assembly 1, that is, the right end shown in fig. 7, are provided with third positioning structures 214, the second positioning structures 213 include an upward protruding hook-shaped fastener and a downward recessed fastener groove, and the third positioning structures 214 include an upward protruding protrusion with a fastener hole and an inward recessed groove with an upward protruding hook-shaped fastener. The brush carrier 21 also specifically has seted up the mounting groove for the right-hand member of second annular draw-in groove with the one end that the second end of conducting rod subassembly is relative as shown in fig. 7, the mounting groove is used for pegging graft fixed second contact pin structure 5, second contact pin structure 5 includes second contact pin 51 and second contact pin seat 52, second contact pin seat 52 passes through the buckle structure joint with the mounting groove and fixes, second contact pin seat 52 is the square column and sets up two rows of pinholes (not shown) of upper and lower array arrangement on it, second contact pin 51 is the L style of calligraphy, one end is pegged graft and is fixed on the brush board, the other end is worn out second end 13 along the axial and also is extended to the outside of brush carrier 21 as shown in fig. 7. The brush plate 22 is a plate, the brush plate 22 may be an existing conventional PCB plate, and is disposed outside the brush holder 21, and the brush wire 20 passes through the wire holes and extends downward to be in sliding contact with the outer surface of the conductive ring 10. The brush wire 20 is in an Ω shape, the brush wire 20 is electrically connected to the second pin 51, specifically, a plurality of second insertion holes (not shown) are formed at one end of the brush plate 22 facing the second pin 51, that is, the right end as shown in fig. 7, and the second pin 51 is correspondingly inserted into the second insertion holes. For the brush filaments 20, the brush filaments 20 on the upper and lower brush holders 21 are staggered, for example, a first brush filament 20 and a second brush filament on the upper brush holder 21 near the first end 12 are in sliding contact with a first conductive ring 10 and a second conductive ring 10 on the conducting rod assembly 1 near the first end 12, respectively, a first brush filament 20 and a second brush filament 20 on the lower brush holder 21 near the first end 12 are in sliding contact with a third conductive ring 10 and a fourth conductive ring 10 on the conducting rod assembly 1 near the first end 12, and so on, and thus, detailed description and limitation are not given here. It is also possible for only one brush holder 21 to be provided, including two upper and lower opposed mounting portions (not shown) to which brush filaments 20 are respectively fixedly mounted.

For the housing 8, as shown in fig. 1, the housing is in a T-shape tube shape, and an end cap is disposed at one end of the housing, for example, the right end as shown in fig. 1, and the end cap is clamped with the housing, so that the structure is simple, and the disassembly and maintenance are convenient. The specific structure is not described or limited in detail.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A slip ring connector, comprising:

2. Slip ring connector according to claim 1, characterized in that the flexible circuit board comprises:

3. The slip ring connector according to claim 2, wherein the end of the soldering portion connected to the pin portion is provided with a protrusion extending outward, and the protrusion is adapted to be fixed in a snap-fit manner in a snap-fit groove formed on an inner wall of the rotating member facing the end of the first pin structure.

4. The slip ring connector according to claim 2, wherein the flexible printed circuit further comprises a bending portion integrally formed with the soldering portion and the pin portion and disposed between the soldering portion and the pin portion, the bending portion being adapted to be located outside the rotating member and the first pin structure.

5. Slip ring connector according to any of claims 2-4, characterized in that the soldering points are spaced in two rows, where a plurality of spaced soldering points are provided in any row and the soldering points in the two rows are offset.

6. Slip ring connector according to claim 5, characterized in that the conductive ring comprises:

7. The slip ring connector of claim 6 wherein an outermost end of a sidewall of the first positioning groove facing the weld is closer to a center of the conductive ring body than an outermost end of a sidewall of the first positioning groove facing away from the weld;

8. The slip ring connector of claim 6 wherein the inner wall of the conductive ring body further comprises at least one protrusion extending radially inward, the protrusion extending in a direction perpendicular to the diameter of the first detent and the second detent.

9. Slip ring connector according to any of claims 6-8, wherein the outer circumferential wall of the conductive ring body is provided with radially inwardly recessed grooves, the brush filaments being adapted to slide into abutment in the grooves.

10. The slip ring connector of claim 2 wherein said brush assembly further comprises a brush plate electrically connected to said brush wires, a brush holder for holding said brush plate, and a plurality of second pins electrically connected to said brush plate, said second pins being disposed opposite said first pins.